Merge torrust#927: ci: coverage build with two jobs

5f3957a ci: coverage build with two jobs (Cameron Garnham)

Pull request description:

ACKs for top commit:
  da2ce7:
    ACK 5f3957a

Tree-SHA512: 4e23a82fa938f12f3490e505f8f1e0294dc2c38c93d4a327c5e51e31786baafeed8d67c249bff843618c624b8bf86f5db078cb119efab00bfc09b66103e8b6dd

Author: da2ce7

.github/workflows/coverage.yaml

@@ -61,7 +61,7 @@ jobs:
 
       - id: build
         name: Pre-build Main Project
-        run: cargo build
+        run: cargo build --jobs 2
 
       - id: test
         name: Run Unit Tests